linux-kernel - [PATCH platform-next v2 01/11] lib/string_helpers: Introduce string_upper() and string

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Date:   Tue, 14 Jul 2020 15:01:53 +0300
From:   Vadim Pasternak <vadimp@...lanox.com>
To:     andy@...radead.org, dvhart@...radead.org
Cc:     platform-driver-x86@...r.kernel.org, linux-kernel@...r.kernel.org,
        Vadim Pasternak <vadimp@...lanox.com>
Subject: [PATCH platform-next v2 01/11] lib/string_helpers: Introduce string_upper() and string_lower() helpers

Provide the helpers for string conversions to upper alnd lower cases.

Signed-off-by: Vadim Pasternak <vadimp@...lanox.com>
---
 include/linux/string_helpers.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

diff --git a/include/linux/string_helpers.h b/include/linux/string_helpers.h
index c28955132234..86f150c2a6b6 100644
--- a/include/linux/string_helpers.h
+++ b/include/linux/string_helpers.h
@@ -2,6 +2,7 @@
 #ifndef _LINUX_STRING_HELPERS_H_
 #define _LINUX_STRING_HELPERS_H_
 
+#include <linux/ctype.h>
 #include <linux/types.h>
 
 struct file;
@@ -75,6 +76,20 @@ static inline int string_escape_str_any_np(const char *src, char *dst,
 	return string_escape_str(src, dst, sz, ESCAPE_ANY_NP, only);
 }
 
+static inline void string_upper(char *dst, const char *src)
+{
+	do {
+		*dst++ = toupper(*src);
+	} while (*src++);
+}
+
+static inline void string_lower(char *dst, const char *src)
+{
+	do {
+		*dst++ = tolower(*src);
+	} while (*src++);
+}
+
 char *kstrdup_quotable(const char *src, gfp_t gfp);
 char *kstrdup_quotable_cmdline(struct task_struct *task, gfp_t gfp);
 char *kstrdup_quotable_file(struct file *file, gfp_t gfp);
-- 
2.11.0